Final answer:
The relationship between Frustrated and Furious is the same as the relationship between Feisty and Sassy.
Step-by-step explanation:
When we have a word pair in the format A:B::C:X, it means that the relationship between A and B is the same as the relationship between C and X. In this case, frustrated is a stronger form of the emotion furious. So, we need to find the word that represents a stronger form of the word feisty.
Out of the options provided, the word that represents a stronger form of feisty is sassy. Both feisty and sassy describe a bold, lively, and spirited personality, with sassy having a stronger and more confident connotation.
Therefore, the correct answer is b) Sassy.